Test 4 – % on body with text and sidenote font sizes set in ems; line height in pixels

body {
	font-size:100%;
	line-height:18px;
}

.bodytext p {
	font-size:0.875em;
}

.sidenote {
	font-size:0.75em;
}

Test page

Browser	Default (text medium, zoom 100%)	Text larger	Text largest	Text smaller	Zoom 110%	Zoom 120%	Zoom 90%
Firefox 2 Mac					n/a	n/a	n/a
Safari 2					n/a	n/a	n/a
IE6					n/a	n/a	n/a
IE7
Opera 9.5α Mac		n/a	n/a	n/a